Gustin Family History
Gustin Surname Meaning
French Walloon German and Swedish; Slovenian and Croatian (mainly Guštin): from a short form of the personal name Augustin (Slovenian Avguštin Avgustin Croatian Auguštin Augustin) from Latin Augustinus (see Austin).
Compare Gustine. In some cases possibly also an American shortened form of Slovenian Gustinčič: patronymic from the personal name Gustin (see 1 above).
Source: Dictionary of American Family Names 2nd edition, 2022